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Originally Posted by westsky
Thanks Itchy, that makes things a bit clearer for me as well. I used Rawshooter to convert to Tiffs then I stacked 4 of the images with Registax then did some processing in Photoshop CS It's interesting to see how much detail there is in very short exposures taken in very light polluted sky.
David
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Hi David,
That is a great improvement on your first post. Well Done. Image stacking is the secret to good astro images. You can easily see the difference between a single image and a stack of 4. The more you stack, the better the image will be. This is because the noise in the image is reduced by the square root of the number of images stacked. So 4 images = half the noise. 10 images the noise is reduced to around one third. 100 images gives you a 10 fold reduction in noise.
Cheers